Fire stop for elevator doors



Feb. 23 1926.

H. c. WALDMA'N FIRE STOP FOR ELEVATOR noons Filed July 2 1922 'INVENTOI? Herman (I. Wa/dman IIIIIIIIIII/I/ ATTORNEY Patented Feb. 23, 1926.

HERMAN O. WALDMAN FIRE STOP FOR OF ST. LOUIS, MISSOURI.

ELEVATOR. DOORS.

Application filed July 28, 1922. Serial No. 578,254.

To (HZ whom if may concern:

Be it known that I, HERMAN C. lVALD- MAN, a citizen of the United States, residing at St. Louis, ll iissouri, have invented a cer tain new and useful Improvement in Fire Stops for Elevator Doors, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to counterbalanced lire doors for elevator shafts, and particularly horiZontallydivided fire doors of the type in which the top and bottom sections of the door are arranged in paral el relation to each other, but in different vertical planes, so as to provide a space between the top section of the door and the lintel of the door opening that willreceive the bottom section of a vertically-aligned door of the Same type located on the floor above, when said upper door is moved into its open position, such doors being used principally in buildings in which the distance between the lintcl ot a door opening and'the floor above is not deep enough to receive two door sections that lie in the same vertical plane, one above the other,

Owing to the fact that the top section of such a door is spaced away from the lintcl off the door opening when the door is in its closed position, there is danger of fire escaping from the elevator shaft into the room I or from the room into the elevator shaft through the space between said llntel and top door section.

The main object of mypr'esent invention is to provide an efficient means of novel construction for closing the space between the lintcl of the door opening and the top section of the door that will not interfere with the downward movement of the bottom section of the vertically-aligned door located at the floor above.

Figure 1 is a vertical sectional View, illustrating a fire door structure embodying my invention, in which the means for closing the space between the top section of the door and the lintcl of the door opening con sists of a hinged or pivotally mounted fire stop carried by said lintel; and

Figure 2 is a bottom plan view of the parts shown in Figure 1.

Referring to the drawings, which illustrate the preferred form of my invention. A designates the top section of a counterbalanced lire door and B designatesthe lintel of the opening which said door closes, the top section A of the door being spaced away from the lintel B, so as to provide a space for receiving the bottom section of the vertically-aligned door located at the floor above when said bottom section is moved downwardly intov its open position.

In order to prevent fire from escaping through the space between the top section it of the door and the lintcl B afire stop C is provided for normally closing said space,

said fire stop being n'iounted on the linteLB in such a manner that it will open automatically or move, into an inoperative position when the bottom section of the door above is moved dmvnwardly through the space between the lintcl B and the top section A of the door shown in Figure 1. The the stop 0 can be mounted in various ways without departing from the spirit of my invention, but when the lintcl of the door opening is formed by angles or metal plates, it is pref erahle to pivot-ally mount the fire stop C on th-eslintel and provide one or more counter weights D that normally hold said fire stop in a horizontal position, as shown in full lines in Figure 1, so to effectively close the space between the lintcl and the top One convenient way of mounting the fire stop Cris to 1 that are to hinge members said fire stop-consisting of a metal plate provided with angularly-disposed arms 4 on which weights hen the door is of the type that comprises a binder or other suitabledcvice at the upper end of the door opening for preventing the top section ofthe door 'from pulling away or springing away from the lintcl, as described'in my prior U. S. Patent No. 1,034,848, dated August 6, 1912, I prefer to provide the top section of the door with a depending pin or other device 5 arranged at the upper edge of same, as shown in Figure 1., and provide the fire stop C with an extension 6 having an opening 7 in same for receiving the binding device 5 when the top section of the door is in its closed position, said extension 6 projecting into a substantially channel-shaped, vertical housing 8 on the top section A of the door, as shown in Figure V In an elevator fire door structure of the said fire step with section of the doors provide it-with hinge members pivotally connected by pivots 2' 3 carried by the lintel B,

D are adjustably mounted.

Q I I 1,574,216

character above described there is noliability of fire escaping from the elevator shaft into the room or from the room into the elevator shaft over the upper edge of the top section of the door when the door is closed, due. to the fact that the space between the top section of the door and the lintel B of the door opening is closed by the fire stop 0. While said fire stop elfectively closes the space between the top sec tion of the door and the lintel of the door opening; it does not interfere with the up"- ward movement of the top section of the door or the downward movementof the bottom section of the vertically-aligned door located at the fioor above, owing to the fact that said stop is mounted in such a way that it will swing downwardly into an in operative position, as shown'in broken lines in Figurel, when it is engaged by the bottom section of the door above during the operation of opening the latter. As soon as the door above is closed, the tire stop G will return automatically to its normal closed position, and as it is provided with a means that co-operates with apart on the top sec} tion of the ,door to prevent the intermediate portion of said top section from springing away from the'firestop when said top section is sub ected to excessive heat from a" fire, said firestop serves not only as a a closure for the space between the top section of the door and the, lintel of the door o-nen1'ng,'but also as ameans for securely holding the top section of the door in position" and preventing it from fbulglng or hucklin'gint'o such a shape that fire can. ass' cve the upper edge oflthe door'leither into the elevator opt on; jth'e shaftgrim c as o assessed my iii-veteran, t at and desire to secure by Let- I i clfaiinasii; ters Patent is? 11 An elevator:

acts as a closure for. thesp ace between said door sectionahd lintel whensaiditop door section and v the door above are. in, their esed're enfire" door "structure, com prising a topdoor sectionspacedawa' from' thel'i'ntfelof the ;door opening so as wrong; a 'passageway'tor' vertically aligned 'door' located-at a higher level, andanbscillating are"sr earriec by the lintel that normally when said top door section and the door above are in their closed position, said fire stop being carried by a part that is stationary with respect to said bottom section and adapted to be moved into an inoperative position by said bottom section when it is depressed, and means for restoring said fire stop to its normal operative position when said botton door section is thereafter raised. p

3. In an elevator fire door structure of the type in which the door comprises a vertically1novable top section that is spaced away from the lintel of the door opening, vtor the purpose described a fire stop pivotally mounted on said lintel for normally closing the space between said lintel and said top door section.

4. In an elevator fire door structure of the type in which the door comprises a vertically-movable top section that is spaced away from the lintel of the door opening, for the purpose described afire stop pivotally mounted on said lintel tor normally closing the-space between said lintel and said top door section, and a counterweight combined with said' fire stop for normally maintaining it inits closed position.

o. In an elevator fire door structure of the type'in which the door comprises a ver tically-movable top section'thatis spaced a'i'v'at n-cmthe lintel "oflthe' door. opening for f i said" top door section, conn terweights combined with said fire stop for normally main ta-ining it in" its closed position,- and means on'said .fire stop that co-ope rateswiththe top;s''ctiio1i of the door to prevent the inter-- HERMAN wanna.

I purpose described, a fire sto otally mounted on said lintel for normally closing the spacebetween said lintel and,

i s iee e to es ive 

